International Research Journal of Engineering and Technology (IRJET) Volume: 08 Issue: 06 | June 2021 2021
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e-ISSN: 2395-0056 p-ISSN: 2395-0072
“Stress Analysis of Spur Gear using Different Gears Design” ARYAN BHALERAO UG Student, Department of Mechanical Engineering, MCT’s Rajiv Gandhi Institute of Technology, Versova ---------------------------------------------------------------------***--------------------------------------------------------------------These gears increase or decrease shaft speed with high Abstract - Gear is one of the most important machine degree of precision at a constant velocity. They does not elements in the mechanical power transmission system. slip during any operation and their durability It is a rotating machine part having a tooth that meshes with another toothed part in order to transmit decreases their risk of premature failure. The torque/motion from one shaft to another shaft in such a simplicity of design allow greater manufacturability, way that their ratio of angular velocities is constant. making them less expensive to fabricate and purchase. Generally, two types of cyclic stress are subjected on a It has the power transmission efficiencies between spur gear tooth in action, contact stress and bending 95% and 99% and can transfer large power with minor stress. The bending stress and total deformation of the power loss. They are used in high speed and high load gear tooth is the primary objective of modern gear application in all trains and a wide range of velocity design. The main objective of the project is to suggest a ratios. Hence, they found application right from clocks, suitable gear design for the use of TATA SUPER ACE household gadgets, motor cycles, automobiles and MODEL. While designing the gears, we have considered 5 railways to aircrafts. different Spur gear of Structural Steel material. We first calculated the theoretical value by using the Lewis Bending equation. Then, we modelled these Gears using SOLIDWORK 2021 software and did an Static analysis on ANSYS Workbench 19.2 to find the stresses and deformation . Thus, we validate the result by comparing the values Lewis equation and ANSYS results. Through this, we obtained stresses.. KeyWords: Spur Gears, SOLIDSWORKS, ANSYS Workbench, Structural Steel, Bending stress, Contact stress, TATA SUPER ACE MODEL 1. INTRODUCTION
Fig . 1: Spur Gear
Spur Gears: Spur gears are simple types of gears which are used for power transmission between two reciprocating shaft. It has two gears, one is the driving gear and second is the driven gear. In Spur gears, the teeth are parallel to the axis of rotation. It is mainly used when the axis of driving and driven shaft are parallel and coplanar. The compressive strength created on gear tooth is negligible.
1.2 LITERATURE SURVEY There has been a lot of research being carried out on spur gears with different parameter like module, teeth , thickness, gear material and gear design 1) Putti Srinivasa Rao et al. In this paper the contact stresses were calculated by the Hertz’s equation and then the 3D gear model was tested in ANSYS simulation and the conclusion was drawn.
It can be classified into two pressure angles, 20 degree and 14 ½ degree. They are manufacture by either involute profile or cycloidal profile. The minimum number of teeth on a gear with a normal pressure angle of 20 degree is 18. Spur gears are excellent at moderate speed but tends to be noisy at high speed.
2) Deepika Potghan et al. in his paper studied the stress analysis of spur gear with three different materials to determine the contact stresses in the gear tooth. The materials were grey cast iron, high carbon steel and medium carbon
It has a simple and compact design which makes easy to design and install the gears in restricted spaces. © 2021, IRJET
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